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Perpetual Calendar

Brand: Robotime
SKU: LK201

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Sure, your phone calendar is great, but not nearly as cool as this Perpetual Calendar. Go offline and turn the dials to calculate the day of week for a future date or simply use it as a desk calendar to display the current date.

The Perpetual Calendar is a model that you build from laser-cut, wooden parts. Just pop the parts out and slot them together with the help of the detailed illustrated instructions. This is one of our more challenging builds, but if you're patient, even first-time builders will find it satisfying.

Build difficulty

  • Moderate ★★★☆☆
  • 26 pieces
  • Build time: 2 hours


  • 5 plywood sheets
  • Illustrated instructions


  • Model Number: LK201
  • Model weight: 600 grams
  • Assembled size: 175 x 90 x 170 mm
  • Box weight: 1.2 kg
  • Box size: 420 x 330 x 255 mm


  • Not a toy - not suitable for children 3 or under
  • Includes small parts that could be a choking hazard


What could possibly go wrong?
Although you're pretty much just punching out parts and putting them in the right places, all model building requires skill. If you're not careful, you could damage the parts during removal, lose parts or install parts the wrong way round. Some parts are delicate and can get damaged if you apply too much pressure. Constantly pushing the pieces into place can hurt your thumbs after a while, so it's best to build it in stages. As with any skill, the more practice and experience you have, the better the result. Take your time and enjoy the experience.

Can this calendar work forever?
Yes, in theory it works as a perpetual calendar. However the dial displaying the year can only go so far, which in this case is the year 2040.

What is the recommended minimum age to build the Calendar?
14, but expect to jump in and help out occasionally.

What is the recommended maximum age to build the Calendar?
You need steady hands and decent eyesight. The writing on the instructions and some parts are small, so a small magnifying glass comes in handy.

Do any parts move?
Yes, but only by hand. The various wheels are rotated to display the current date or to determine what day it will be on a future date.

Is the Calendar fragile?
If it topples over? Probably not. If it is dropped from a height? There's a good chance something will break.

Do I need to sand the parts?
The parts on some wooden model kits can be slightly rough on the edges and it's recommended that you give them a light sanding. However with most parts in this kit, this is unnecessary. Occasionally when you remove parts, they might not detach from the sheets cleanly, leaving a tiny burr. You can remove this using the supplied sandpaper. 

Can I paint the Calendar?
We think it looks cool in a raw finish, but one of the nice things about a kit is you can make it your own, so feel free to personalise as you wish. The calendar is made from plywood so you can apply just about anything including paint or lacquer. Our recommendation is to paint prior to assembly as getting a brush into every little section would be really fiddly once it's finished. The moving gears need to be carefully aligned and excess paint may prevent these parts from moving. If necessary, lightly sand your paint on parts that need adjusting.